I would recomend you not pay any attention to online crime statistics. Different police depts report crime differently. Some departments dont report anything so all you get is data from the state or county. What is useful is that some departments will allow you to see (online, or request it) crime maps or a full call list for a particular area.
As for Mo'ville, I lived there for 8 years and was not aware of any crime in my neighborhood except for burgleries of houses under construction, which was basically a constant occurance. Im pretty sure its a huge scam - contractors would put something in the house, the next week they would go back and take it out, and the builder would call the police and report it stolen and insurance reimbursed the builder. The thing I noticed was that whenever anything got stolen, it never really delayed constructio. ie, electrical components were stolen before the inspection, so the builder could replace it without having to get another inspection. And once it was inspected, it didn't get stolen.
Back to the point, everyone left toys, bikes, mowers etc out, car windows open, doors unlocked. Nothing ever happened. Seems to be as crime-free a place as you can find.